+++ /dev/null
-
-/*
- *
- * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
- *
- */
-
-#include "LETypes.h"
-#include "LEScripts.h"
-#include "LEGlyphFilter.h"
-#include "LEGlyphStorage.h"
-#include "LayoutEngine.h"
-#include "OpenTypeLayoutEngine.h"
-#include "ArabicLayoutEngine.h"
-#include "ScriptAndLanguageTags.h"
-#include "CharSubstitutionFilter.h"
-
-#include "GlyphSubstitutionTables.h"
-#include "GlyphDefinitionTables.h"
-#include "GlyphPositioningTables.h"
-
-#include "GDEFMarkFilter.h"
-
-#include "ArabicShaping.h"
-#include "CanonShaping.h"
-
-U_NAMESPACE_BEGIN
-
-le_bool CharSubstitutionFilter::accept(LEGlyphID glyph) const
-{
- return fFontInstance->canDisplay((LEUnicode) glyph);
-}
-
-UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ArabicOpenTypeLayoutEngine)
-
-ArabicOpenTypeLayoutEngine::ArabicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode,
- le_int32 languageCode, le_int32 typoFlags,
- const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable,
- LEErrorCode &success)
- : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success)
-{
- fFeatureMap = ArabicShaping::getFeatureMap(fFeatureMapCount);
- fFeatureOrder = TRUE;
-}
-
-ArabicOpenTypeLayoutEngine::ArabicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode,
- le_int32 languageCode,
- le_int32 typoFlags, LEErrorCode &success)
- : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success)
-{
- fFeatureMap = ArabicShaping::getFeatureMap(fFeatureMapCount);
-
- // NOTE: We don't need to set fFeatureOrder to TRUE here
- // because this constructor is only called by the constructor
- // for UnicodeArabicOpenTypeLayoutEngine, which uses a pre-built
- // GSUB table that has the features in the correct order.
-
- //fFeatureOrder = TRUE;
-}
-
-ArabicOpenTypeLayoutEngine::~ArabicOpenTypeLayoutEngine()
-{
- // nothing to do
-}
-
-// Input: characters
-// Output: characters, char indices, tags
-// Returns: output character count
-le_int32 ArabicOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count,
- le_int32 max, le_bool rightToLeft, LEUnicode *&outChars,
- LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- outChars = LE_NEW_ARRAY(LEUnicode, count);
-
- if (outChars == NULL) {
- success = LE_MEMORY_ALLOCATION_ERROR;
- return 0;
- }
-
- glyphStorage.allocateGlyphArray(count, rightToLeft, success);
- glyphStorage.allocateAuxData(success);
-
- if (LE_FAILURE(success)) {
- LE_DELETE_ARRAY(outChars);
- return 0;
- }
-
- CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, outChars, glyphStorage);
-
- // Note: This processes the *original* character array so we can get context
- // for the first and last characters. This is OK because only the marks
- // will have been reordered, and they don't contribute to shaping.
- ArabicShaping::shape(chars, offset, count, max, rightToLeft, glyphStorage);
-
- return count;
-}
-
-void ArabicOpenTypeLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
- LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return;
- }
-
- if (chars == NULL || offset < 0 || count < 0) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
-
- if (!fGPOSTable.isEmpty()) {
- OpenTypeLayoutEngine::adjustGlyphPositions(chars, offset, count, reverse, glyphStorage, success);
- } else if (!fGDEFTable.isEmpty()) {
- GDEFMarkFilter filter(fGDEFTable, success);
- adjustMarkGlyphs(glyphStorage, &filter, success);
- } else {
- LEReferenceTo<GlyphDefinitionTableHeader> gdefTable(CanonShaping::glyphDefinitionTable, CanonShaping::glyphDefinitionTableLen);
- GDEFMarkFilter filter(gdefTable, success);
-
- adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
- }
-}
-
-UnicodeArabicOpenTypeLayoutEngine::UnicodeArabicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success)
- : ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags | LE_CHAR_FILTER_FEATURE_FLAG, success)
-{
- fGSUBTable = (const GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable;
- fGDEFTable = (const GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable;
- /* OpenTypeLayoutEngine will allocate a substitution filter */
-}
-
-UnicodeArabicOpenTypeLayoutEngine::~UnicodeArabicOpenTypeLayoutEngine()
-{
- /* OpenTypeLayoutEngine will cleanup the substitution filter */
-}
-
-// "glyphs", "indices" -> glyphs, indices
-le_int32 UnicodeArabicOpenTypeLayoutEngine::glyphPostProcessing(LEGlyphStorage &tempGlyphStorage, LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- // FIXME: we could avoid the memory allocation and copy if we
- // made a clone of mapCharsToGlyphs which took the fake glyphs
- // directly.
- le_int32 tempGlyphCount = tempGlyphStorage.getGlyphCount();
- LEUnicode *tempChars = LE_NEW_ARRAY(LEUnicode, tempGlyphCount);
-
- if (tempChars == NULL) {
- success = LE_MEMORY_ALLOCATION_ERROR;
- return 0;
- }
-
- for (le_int32 i = 0; i < tempGlyphCount; i += 1) {
- tempChars[i] = (LEUnicode) LE_GET_GLYPH(tempGlyphStorage[i]);
- }
-
- glyphStorage.adoptCharIndicesArray(tempGlyphStorage);
-
- ArabicOpenTypeLayoutEngine::mapCharsToGlyphs(tempChars, 0, tempGlyphCount, FALSE, TRUE, glyphStorage, success);
-
- LE_DELETE_ARRAY(tempChars);
-
- return tempGlyphCount;
-}
-
-void UnicodeArabicOpenTypeLayoutEngine::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, le_bool /*mirror*/, LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return;
- }
-
- if (chars == NULL || offset < 0 || count < 0) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
-
- le_int32 i, dir = 1, out = 0;
-
- if (reverse) {
- out = count - 1;
- dir = -1;
- }
-
- glyphStorage.allocateGlyphArray(count, reverse, success);
-
- for (i = 0; i < count; i += 1, out += dir) {
- glyphStorage[out] = (LEGlyphID) chars[offset + i];
- }
-}
-
-void UnicodeArabicOpenTypeLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
- LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return;
- }
-
- if (chars == NULL || offset < 0 || count < 0) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
-
- GDEFMarkFilter filter(fGDEFTable, success);
-
- adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
-}
-
-U_NAMESPACE_END
-
projects / apple / icu.git / blobdiff